• The Korean Journal of Mycology
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• v.22 no.3
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• pp.229-246
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• 1994

Powdery mildew fungi from 246 different species of host plants were collected at Kangwon province during 1989-1993 years. They were identified and classified into 13 genera and 83 species by examining various morphological characteristics of taxonomic value. Most of host plants were infected with one species of powdery mildew fungus, but eight plant species with two or three different mildews. Among 246 host plants collected, 43 species were added as the new host plants of powdery mildew fungi in Korea. Two Oidium spp. from Hibiscus and several Compositae plants were described to suggest their taxonomic problems.

• Korean journal of applied entomology
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• v.51 no.4
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• pp.331-342
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• 2012

The effects of number of host plants and nectar plants on the number and diversity of butterflies were monitored and analyzed by simple and multiple regression from May 2008 to Sep 2009 in the Bubjusa region (Mt. Sokri, Boeun-gun, Chungcheongbuk-do), which was divided into four regions. The results demonstrate that the number of butterflies has a positive correlation with the number of host plant species, the number of nectar plant species, and the number of host plants multiple regression analysis. The number of butterflies also increased habitat area. However, the butterfly species number and diversity index showed lower correlation with the number of host plants and the area size of the divided region, respectively, when analyzed by simple regression. In addition, increased species diversity in a region with more diverse plant flora. These results suggest that the composite distribution of host and nectar plants with diverse plant flora is required for butterfly diversity and population preservation. Additionally, it also suggest that vegetation types complementarity all factors.

• Korean journal of applied entomology
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• v.41 no.1
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• pp.15-19
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• 2002

Host plants of Popillia quadriguttata (Fabricius) were investigated in golf courses, Fifteen plant species of 15 genera in 13 families were confirmed as host plants of P. quadriguttata. Thus, total number of host plants of P. quadriguttata was 26 species of 25 genera in 18 families including 11 recorded species in literature. In addition, P. quadriguttata adults fed on 30 plant species of 25 genera in 19 families out of the 69 plant species of 53 genera in 33 families supplied as food in laboratory, P. quadriguttata adults preferred Wistaria floribunda in golf courses but Tilia mandshuric, Platanus orientalis, Diospyros lotus, Punica granatum and Chionanthus retusa in laboratory.

• Korean Journal of Plant Taxonomy
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• v.39 no.1
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• pp.4-11
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• 2009

Anatomical features of both leaves and stems of the four mistletoes in Korea (Viscum album var. coloratum, Korthalsella japonica, Loranthus yadoriki, L. tanaka) and of their secondary haustorial structure within several host plants were investigated. Among the four mistletoes, there were diagnostic characters of the anatomy of leaves and stems which enabled us to distinguish the four taxa. Leaves were observed to have three distinct characters including unifacial or bifacial leaves, the number of vascular bundles in the midveins, and the level of development of sclerenchyma cells. There were four diagnostic characters of stems: overall morphology of stems in transverse view, degree of cuticle development, arrangement of vascular bundles, and features of the sclerenchyma and pith. In order to determine secondary haustorial traits, the research focused on the seven host plants of L. yadoriki and on the five host plants of K. japonica. The following features were found to be important: presence or absence of an aerial runner root, the shape of the haustorial strand and flange, the degree of penetration into host tissues, and their development of shaft in transverse view, the development both of secondary haustorial cells and short tracheid in hyphae. Korthalsella japonica and L. yadorki were clearly distinguished by these characters. The secondary haustorial forms in each host were somewhat different, due to varying degrees of development in the strength of the host plants' wood. However, qualitative characters like the final position of the secondary haustorial penetration into host tissues and the development of short tracheid cells were not only affected by the degree of development of the host plants, but also useful for the systematic study.

• The Korean Journal of Mycology
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• v.23 no.3 s.74
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• pp.246-256
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• 1995

Phenotypic characteristics, pathogenicity and fungicides resistance of fifty one isolates of Botrytis cinerea obtained from various host plants were observed and determined. The relationships between these characteristics were also investigated on the basis of isolation host plants. The isolates of B. cinerea varied in the capacity of sclerotia formation and sporulation. The pathogenicity of 44 isolates from tomato, cucumber, and strawberry was significantly stronger with 3.2 cm in average diameter of necrotic lesions on cucumber leaves than that of seven isolates from other host plants such as orange, gerbera, ginseng, kiwi, grape, pear and from butter with 1.8 cm in average diameter of necrotic lesions. Benomyl resistance of 12 isolates from tomato plants was much higher with the $EC_{50}$, 562 ppm than that of 19 isolates from various host plants. Diethofencarb resistance, however, of 11 isolates from strawberry plants was highest with the $EC_{50}$, 210 ppm among isolates from other host plants. Polygalacturonase activity varied among isolates in the range of 0 to 103 unit and that of isolates from tomato, cucumber and strawberry was slightly lower than that of isolates from other host plants. No significant relationship between pathogenicity and fungicides resistance, polygalacturonase activity was found among 51 isolates of B. cinerea. Isozyme patterns of polygalacturonase produced from two strongly and weakly pathogenic isolates (FC122, KC6) were slightly different depending upon carbon sources during cultivation.

• Korean journal of applied entomology
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• v.53 no.2
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• pp.185-191
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• 2014

Corythucha marmorata (Uhler) belonging to the family Tingidae (Hemiptera) has been reported in Korea. In 2013, surveys were conducted to study its morphological characteristics, geographical distribution, and host plants. The adult is brown white and 2.77-3.28 mm in length, and the mature nymph is yellowish brown. Heavily infested trees appear yellowish white because they are fed on by the nymphs on the under surface of host plants. C. marmorata were found between early June and late October, and their numbers peaked in early July to late August. In 2013, the occurrence of C. marmorata was confirmed in 27 cities and counties nationwide, and 8 families and 24 species of host plants were identified. C. marmorata feeds on the following major host plants: Conyza canadensis, Aster pilosus, Helianthus annuus, Artemisia princeps, Rudbeckia bicolor, and Solanum melongena.

• Asian Journal of Turfgrass Science
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• v.22 no.2
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• pp.179-184
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• 2008

Host plants of Ectinohoplia rufipes (Mitschulsky) were investigated in golf courses in Gapyeong, Gyeonggi. Ten plant species in 7 families were observed to be fed on from golf courses. Thus, total number of host plants of Ectinohoplia rufipes were 94 species in 30 families. Rhododendron indicum and Rhododendron japonicum for. flavum in Ericaceae, Euonymus alata for. ciliato-dentatus in Celastraceae, Ulmus davidiana for. suberosa in Ulmaceae, Malus pumila var. dulcissima and Malus baccata in Rosaceae, Weigela florida for. subricdor in Caprifoliaceae, Betula platyphylla var. japonica in Betulaceae, Salix purpurea var. japonica in Salicaceae, and Quercus palustris in Fagaceae were newly listed host plants of Ectinohoplia rufipes in golf courses. Betula platyphylla var. japonica, Malus pumila var. dulcissima and Quercus palustris were heavily damaged host plants of Ectinohoplia rufipes.

• The Korean Journal of Mycology
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• v.41 no.3
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• pp.137-141
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• 2013

Diversity of endophytic fungi of two species associated with host plants, Pinus densiflora and Larix kaempferi in Mt. Oser were investigated. Endophytic fungi were isolated from surface sterilized leaves of the 13 host plants and identified by morphological traits and rDNA ITS sequences analysis. Totally 37 isolates were discovered and identified into 17 taxa. Of them, 59% isolates belonged to Leotiomycetes, 30% isolates Sordariomyetes, 8% isolates Dothideomycetes and 3% isolates Agaricomycetes. Results showed a similar diversity pattern with previous studies. Also, species diversity (H') of endophytic fungi isolated from L. kaempferi was higher than that from P. densiflora. The endophytic species composition showed significant differences between host plants. Particularly, taxon of Lophodermium is a major genus in the host plants. However, critical research of the endophytic species diversities within the genus in Korea is required. The communities of endophytic fungi isolated in this study showed differences in diversities and species composition between host plants.

• Journal of Plant Biology
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• v.39 no.3
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• pp.179-184
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• 1996

The purpose of this study is to obtain the most efficient combination of Agrobacterium tumefaciens strains and Ti plasmids for the construction of dicotyledonous plant vector system. Ti plasmid-curing A. tumefaciens A136 and KU12C3 were transformed with four kinds of Ti plasmids, pTiBo542, pTiA6, pTiKU12 and pTiAch5, respectively. The stems of 28 species of dicotyledonous plants were then inoculated with these transformants and examined for crown gall formation. The different combination of A. tumefaciens strains and Ti plasmids showed quite a difference in terms of the crown gall formation. Agrobacterium strins A136 and KU12C3 have a same plant host range in case that both strains harour the same kind of Ti plasmid, pTiBo542 or pTiAch5. However, the above-mentioned both strains have quite different host range in the event of containing the same Ti plasmid, pTiKU12 or pTiA6. In case that KU12C3 contains pTiA6 or pTiKU12, this strain has a wider plant host range than A136. The plant host range of pTiBo542 is the widest, followed by pTiA6, pTiKU12 and pTiAch5. Twelve plants among 28 tested plants are not transformed by any virulent Agrobacterium strains used in this study. In conclusion, A. tumefaciens KU12C3 and A136 harboring pTiBo542 showed the widest host range for transforming dicotyledonous plants. Also, it was acertained that the host range of Ti plasmids is affected by chromosomal level.

• The Korean Journal of Mycology
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• v.42 no.1
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• pp.34-39
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• 2014

In this study, the community structures of arbuscular mycorrhizal fungi (AMF) in rhizospheres of Camellia japonica and neighboring woody plants in Wando, Korea were investigated. Rhizospheres of C. japonica and other woody plants were dominated by the same species, Acaulospora mellea, but Shannon's index, species richness and total spore numbers of the AMF communities were higher in non-C. japonica than in neighboring plants. Regardless of host plant species, the frequency of A. mellea was significantly high comparing with other AMF species. The community similarity of AMF within C. japonica was significantly higher than between C. japonica and neighboring plants or neighboring plants (p<0.005). Results showed that AM fungal communities in rhizospheres of C. japonica have unique community structure and are different from that of neighboring host plants, suggesting that community structure of AMF could be influenced by host plant species.